Scale level results for the LYMPH-Q Upper Extremity Module

Scale	RMT analysis										ICC (95% CI)	Floor %	Ceiling %	Missing %
	# completed scale	# included in RMT	Scored on scale %	χ2	DF	P value	PSI +extr	PSI -extr	α +extr	α -extr
Appearance	3287	2721	82.8	62.09	90	0.99	0.93	0.92	0.97	0.95	0.96 (0.94–0.98)	2.2	14.3	0.4
Psychological	3273	2505	76.5	99.27	96	0.39	0.80	0.83	0.93	0.91	0.94 (0.90–0.96)	0	22.7	0.8
Function	3293	2635	80.0	57.51	96	0.99	0.84	0.87	0.94	0.92	0.95 (0.92–0.97)	0.2	19.0	0.2
Symptoms	3300	3157	95.7	127.17	135	0.67	0.88	0.89	0.93	0.93	0.92 (0.87–0.95)	0	4.1	0.1
Arm sleeve	2314	2186	94.5	59.80	90	0.99	0.87	0.86	0.91	0.89	0.94 (0.89–0.96)	0.5	4.5	1.1
Information	1816	1504	82.8	83.89	72	0.16	0.91	0.90	0.95	0.92	0.92 (0.85–0.95)	4.3	11.8	1.4

χ² = chi square; df = degrees of freedom; PSI + extr = Person Separation Index with extremes; PSI-extr = Person Separation Index without extremes; α+extr = Cronbach alpha with extremes; α-extr = Cronbach alpha without extremes; ICC = intraclass correlation coefficient; Floor = percent of participants scoring at the bottom of the scale; Ceiling = percent of participants scoring at the top of the scale